X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nk11p99mm-asmtpout007.mac.com ([17.158.233.228] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5473268 for flyrotary@lancaironline.net; Sun, 08 Apr 2012 16:13:10 -0400 Received-SPF: pass receiver=logan.com; client-ip=17.158.233.228; envelope-from=glasair2@me.com MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_2AMSkvT2f/JWJa7eFyWuEQ)" Received: from [192.168.2.201] (ip184-189-231-24.sb.sd.cox.net [184.189.231.24]) by nk11p03mm-asmtp997.mac.com (Oracle Communications Messaging Server 7u4-23.01(7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTPSA id <0M2600N8JG4Z3GA0@nk11p03mm-asmtp997.mac.com> for flyrotary@lancaironline.net; Sun, 08 Apr 2012 20:12:36 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.6.7498,1.0.260,0.0.0000 definitions=2012-04-08_06:2012-04-05,2012-04-08,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1012030000 definitions=main-1204080219 From: Steve Thomas Subject: Re: [FlyRotary] DNA Muffler Date: Sun, 08 Apr 2012 13:12:34 -0700 In-reply-to: To: Rotary motors in aircraft References: Message-id: <819C1C60-769D-4AFF-BB96-47C4DB469005@me.com> X-Mailer: Apple Mail (2.1257) --Boundary_(ID_2AMSkvT2f/JWJa7eFyWuEQ) Content-type: text/plain; charset=windows-1252 Content-transfer-encoding: quoted-printable Hey, Bill Regarding the DNA Muffler, I was able to procure one and install it on = my exhaust some time last year. It is the Full Throttle Collector = model. Just wanted to let you know it was essentially worthless. The = exhaust note was so loud that I could not squelch my intercom. After = turning the intercom volume down, it was still too loud for my = Lightspeed Zulu to make me comfortable. I'm in the process of = scavenging some 321 tubing I had it welded to, and after that, I'd be = happy to ship it to you. =20 I am quite frustrated with the whole muffler thing. The only one that = had a decent quieting capability, a Burns Stainless 2 stage unit, was = blown apart after about 30 hours. I could have had a blockage if not = caught. =20 My latest attempt is to use the Racing Beat presilencer and universal = muffler. These units are oval in shape and don't have the same = clearance problems of some, but may be still too big for your = application. I'll let you know how it turns out. =20 Best Regards, Steve Thomas _______________________________________________________ On Apr 8, 2012, at 9:51 AM, Bill Bradburry wrote: > I really don=92t want to redo the exhaust, but I think I have little = choice. I only have about a half to three quarter inch of clearance = between the exhaust and the cowl. I have a piece of heat insulation = glued to the cowl and a piece of thin SS clamped to the exhaust, but it = looks like in flight, the engine moves slightly to the left and causes = the exhaust to touch the cowl.=20 > =20 > Bill B > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of downing.j@sbcglobal.net > Sent: Sunday, April 08, 2012 12:36 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: DNA Muffler > =20 > Bill, If you don't care to redo the exhaust, I installed a sheet of = .016 SS on 1/8th Fibre Frax, this happens to be 11 x 42 inches long and = saved my fannie when I had the engine fire, to protect the fabric on the = belly of my Wittman Tailwind. The rebuild is coming along and the = Marcotte Re-drive has been fitted with a seal retainer and a cooling = system for the gear oil is being developed. JohnD, > ----- Original Message ----- > From: Bill Bradburry > To: Rotary motors in aircraft > Sent: Sunday, April 08, 2012 10:08 AM > Subject: [FlyRotary] DNA Muffler > =20 > I don=92t think this muffler is available for sale anymore. Does = anyone know of a source for it? I am particularly interested in the one = they call the =93Full Throttle Collector=94, because it is only 4=94 in = diameter and I am space challenged. > =20 > My plane is being painted and I think the exhaust is too close to the = cowl and will cause a burn in the paint, so I plan to rebuild the = exhaust when I get it back and would like to include this muffler if I = can find one. > =20 > Any help would be appreciated. > =20 > Bill B --Boundary_(ID_2AMSkvT2f/JWJa7eFyWuEQ) Content-type: text/html; charset=windows-1252 Content-transfer-encoding: quoted-printable Hey, = Bill

Regarding the DNA Muffler, I was able to procure = one and install it on my exhaust some time last year.  It is the = Full Throttle Collector model.  Just wanted to let you know it was = essentially worthless.  The exhaust note was so loud that I could = not squelch my intercom.  After turning the intercom volume down, = it was still too loud for my Lightspeed Zulu to make me comfortable. =  I'm in the process of scavenging some 321 tubing I had it welded = to, and after that, I'd be happy to ship it to you. =  

I am quite frustrated with the whole = muffler thing.  The only one that had a decent quieting capability, = a Burns Stainless 2 stage unit, was blown apart after about 30 hours. =  I could have had a blockage if not caught. =  

My latest attempt is to use the Racing = Beat presilencer and universal muffler.  These units are oval in = shape and don't have the same clearance problems of some, but may be = still too big for your application.  I'll let you know how it turns = out.  

Best Regards,

Steve = Thomas

______________________________________________________= _

On Apr 8, 2012, at 9:51 AM, Bill Bradburry wrote:

I really don=92t want to redo the exhaust, but I think I have little choice.  I only have about a = half to three quarter inch of clearance between the exhaust and the cowl.  = I have a piece of heat insulation glued to the cowl and a piece of thin SS = clamped to the exhaust, but it looks like in flight, the engine moves slightly to = the left and causes the exhaust to touch the cowl.  =

 

Bill = B

 

From: Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On Behalf Of downing.j@sbcglobal.net
Sent: Sunday, April 08, = 2012 12:36 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = DNA Muffler

 

Bill, If you don't care to redo the exhaust, I = installed a sheet of .016 SS on 1/8th Fibre Frax, this happens to be 11 x 42 inches = long and saved my fannie when I had the engine fire, to protect the = fabric on the belly of my Wittman Tailwind.  The rebuild is coming along and = the Marcotte Re-drive has been fitted with a seal retainer and a cooling = system for the gear oil is being developed.  = JohnD,

=

----- Original Message ----- =

Sent: Sunday, April 08, 2012 10:08 AM

Subject: [FlyRotary] DNA Muffler

 

I don=92t think this muffler is available for sale anymore.  Does anyone know of a source for = it?  I am particularly interested in the one they call the =93Full Throttle Collector=94, because it is only 4=94 in diameter and I am space challenged.

 

My plane is being painted and I = think the exhaust is too close to the cowl and will cause a burn in the paint, so = I plan to rebuild the exhaust when I get it back and would like to include this muffler if I can find one.

 

Any help would be = appreciated.

 

Bill B


= --Boundary_(ID_2AMSkvT2f/JWJa7eFyWuEQ)--